Baby Clothing Size Guide

Age labels are a shortcut, not a measurement. Check your baby's length, chest and weight, then compare them with the size chart on the product page.

Three useful numbers

Measure before you choose

↕

Lay baby safely on a flat surface and measure from the top of the head to the heel with the legs gently extended.

↔

Measure around the fullest part of the chest. Keep the tape level and comfortably loose.

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Use a recent reliable weight. If growth or feeding concerns exist, follow your clinician's advice rather than a clothing chart.

Label	Approx. length	Approx. weight	Good to know
Newborn	Up to 56 cm	Up to 4.5 kg	Buy lightly until the fit is known.
0–3 months	56–62 cm	4–6 kg	Useful first size for many babies.
3–6 months	62–68 cm	6–8 kg	Allow room for movement and diapers.
6–9 months	68–74 cm	8–9.5 kg	Check torso length on bodysuits.
9–12 months	74–80 cm	9–11 kg	Prioritise flexible knees and waist.
12–18 months	80–86 cm	10–12.5 kg	Easy dressing helps active toddlers.

Brand charts win. These ranges are a shopping reference. If a product page gives its own measurements, use those first.

Warm weather

Use soft, breathable pieces and check the baby's chest or back for overheating rather than relying on hands and feet.

Air-conditioned rooms

Keep a light layer nearby so it can be removed quickly when the room changes.

Cooler days

Choose layers that do not restrict movement. Remove hats and outdoor layers indoors as appropriate.

Breathable and familiar. Check weave, softness and shrinkage instructions.

Helpful for movement and easier dressing. Follow the care label to protect elasticity.

Inspect buttons, beads, ties and rough seams. Keep loose or damaged parts away from babies.

Shop by fit

Check each product's measurements, then pick the size that gives comfortable movement today.